<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="text" id="app">
    <script>
        var students = [
            {
                name: "李四",
                age: "18岁"
            },
            {
                name: "李二",
                age: "11岁"
            },
            {
                name: "李三",
                age: "19岁"
            },
            {
                name: "王五",
                age: "22.5岁"
            },
        ]
    var input = document.getElementById('app');
    input.onchange = function(event){
        if(keyCode == 13){
            var keyword = this.value;
            var res = students.filter(item=>{
                return item.name.includes(keywork);
            })
            console.log(res)
        }
    }
    </script>
</body>
</html>